Improvement in leather - pebbling machines



m, DULAN.

Laather-Pebbling Machines.

No.155,93l. Patented Oct. 13,1874.

THE GRAPHIC COjPKOYO-LITLJSInI PARK PLACEJLY. I

UNITED STATES PATENT OFFICE.

MICHAEL DOLAN, OF BOSTON, MASSACHUSETTS.

IMPROVEMENT IN LEATHER- PEBBLING MACHINES.

Specification forming part of Letters Patent No. 155,95, dated October 13, 1874; application filed August 17, 1874.

To all whom it may concern:

Be it known that I, MICHAEL DOLAN, of Boston, in the county of Sufi'olk and State of Massachusetts, have invented a certain new and useful Improvement in Leather-Pebbling Machines, of which the following is a description suficiently full, clear, and exact to enable any person skilled in the art or science to which my invention appertains to make and use the same, reference being had tothe accompanying drawings, forming a part of this specification, in which- Figure l is an isometrical perspective view, showing my improvement. Fig. 2 is a sec tional view, showing the spring bed-piece and Fig. 3, a view of the pebbling-iron.

Like letters of reference indicate corresponding parts in the different figures of the drawing.

My invention relates more especially to that class of leather-pebblin g machines which are designed to be operated by power and consists in a novel construction and arrangement of the parts, as hereinafter more fully set forth and claimed, by which a simpler, cheaper, and more effective device of this character is pro duced than is now in common use.

In the drawings, A A A are the standards or frame-work of the machine; B, the swinging arm or lever, which is pivoted at its upper end, and carries the stock 0, in which the pebbling-iron E is secured; G, the bed-piece, and F the table. Disposed upon a shaft mounted in the standards A there is a camwheel, D, for actuating the stock 0, the stock being kept against the face of the wheel by means of the guides K and the contractile action of the spring J. The bed G is arranged at an angle of about forty-five degrees, being supported on the springs a a in the frame-work H. The table F is removable, and is provided with an aperture through which the bed-piece G protrudes when in use. The pebbling-iron F is serrated or roughened on its face, to produce the proper indentations in the leather.

From the foregoing it will be seen by all conversant with such matters that when power is applied to the shaft on which the cam D is arranged, and the same is made to revolve, the stock 0 will becaused to alternately ad vance to and recede from the bed-piece G, by the joint action of the cam and spring J, bring ing the iron E forcibly into contact with the leather, which, for the purpose of being pebbled, must be held upon the table F, and regularly advanced over the bed-piece as the process proceeds. Instead of employing the spring J, the guides K may be constructed and arranged to work in a proper groove cut in the side of the cam D, if preferred, thus imparting a positive motion to the stock 0, as well when it recedes from as when it advances toward the bed G.

Having thus described my invention, what I claim is- The improved pebbling-machine described, consisting of the cam-wheel D, swinging stock 0, pebbling-iron E, and bed G, combined and arranged to operate substantially as and for the purpose specified.

MICHAEL DOLAN.

Witnesses O. A. SHAW, H. E. METGALF. 

